کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5134343 | 1492218 | 2017 | 6 صفحه PDF | دانلود رایگان |
- ESI-MS revealed the formation of three G-quadruplexes from the upstream region of c-Myb transcription start site.
- A natural bioactive alkaloid was found to selectively bind with the three c-Myb G-quadruplexes other than long-chain duplex DNA.
- HRMS was utilized to investigate the binding competition of dehydroevodiamine in the mixture solution of three G-quadruplexes.
In this research, ESI mass spectrometry was used to probe the formation of G-quadruplexes from three G-rich sequences (S1-S3) in the upstream region of the transcription start site in human c-Myb proto-oncogene. A ligand, dehydroevodiamine, was found for its high binding affinities towards the c-Myb G-quadruplexes. In addition, dehydroevodiamine bound towards the Q1-Q3 with high selectivity over long-chain duplex DNA. High-resolution ESI-MS was utilized to investigate the binding competition of dehydroevodiamine in the mixture solution of Q1-Q3 G-quadruplexes, and it appeared to have the binding affinity in the following order: Q3 â Q1 > Q2, which is consistent with the results in the single G-quadruplex solutions. The properties of dehydroevodiamine gave its potential in the future studies of c-Myb expression regulation.
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Journal: International Journal of Mass Spectrometry - Volume 414, March 2017, Pages 39-44